In the land of Welkin, ruled over by iron paw of vicious stoats, Sylver - the leader of a band of outlaw weasels - is on a quest: to find the humans who abandoned the land many years ago and bring them back to Welkin. With his small company of weasels, he journeys south, through myriad adventures, in searce of an ancient castle wherein lies the clue he seeks - Castle Storm And meanwhile in the north, Welkin itself is under threat. For hundreds and thousands rats are pouring down from their marshland homein a bloadthirsty horde to seize power from the stoats.